Crosschecks to the face - okayCrosschecks from behind - okaydouble crosschecks from two different players - okay

I am sure there are countless other types of crosschecks, but all playoffs long I've watched and accepted it because it was the same for both teams. Basically its lacrosse rules out there. Seeing Toews get the double to the back in game 2 from two different Bruins in rapid succession was the kicker. I don't even like Toews, but its ridiculous! What has become of hockey officiating?